So let me show you my computaions... (by the way, this is all based on prices of products/services in the Philippines)
1. DISPOSABLE DIAPERS or DD in short
Given:
6 - (A) ave. price of a single DD
7 - (B) ave. number of diapers that your baby is using everyday
365 - (C) days in a year
2.5 - (D) ave. number of years that your baby will use diapers
Equations:
- A x B = ____ x C = ____ x D = ave. total price